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"Their struggle for citizenship is real, that is the same citizenship we are all entitled to," Glover said.

"This right here is one step, electing Susan Lamb is one step, electing candidates from the ALP is one step. But it has to be sustainable.

"We are all brothers and sisters in this struggle."

Last week he addressed the New South Wales Trades Hall on Indigenous issues.

Glover is the headline act for the ACTU Congress in Brisbane. (9NEWS) (9news)

"Wasn't Australia a prison colony? Look at Georgia where my mother is from. The state of Georgia was a prison colony initially. There's similarities with these places.

"We have to support the Uluru statement from the heart. We have to work and continue to work to find ways of justice. Martin Luther King once said that 'peace is simply not the absence of conflict but the presence of justice'."

While the pairing of the man who played Rogert Murtaugh, with Australia's Council of Trade Unions, might seem a little odd, perhaps even peculiar, the 71-year-old is no stranger to activism.

The son of two postal workers, Glover became a member of a Students Union and has gone on to campaign for civil rights.

American actor Danny Glover has been campaigning with Labor and the ACTU for the past few days. Picture: Supplied (Supplied)

He's also served as a Goodwill Ambassador for the United Nations Development Program.

His website described his main focus as being in the areas of poverty, disease and economic development in Africa, Latin America and the Caribbean.

He once told a magazine: "I try to find hope in struggle and resistance in small places as much as I can. The progressive movement against the war of occupation in Iraq is a reason for hope, as is resistance to free trade agreements in Latin America.

Glover and Mel Gibson with the cast from Lethal Weapn 4 in 1998. Picture: AAP (AAP)

"Those are moments that we have to celebrate: that people still find the resolve and energy to resist."

The ACTU is ramping up its fight for better wages for its members and increased job security as part of the Change the Rules campaign.

In an interview with 9NEWS ahead of the ACTU Congress, Union Secretary Sally McManus said: "At the moment inequality in our country is at a 70-year high, that's not something the trade union movement accepts. It's always been the country of a fair go and we'll fight for that.

"Most countries, developed countries in the world have more secure work than we do in Australia. Our minimum wage should be a living wage, meaning people shouldn't be living in poverty. Penalty rates need to be restored."

Glover at a rally in Washington earlier this year. Picture: AAP (AAP)

The government has hit back, with Workplace Relations Minister Craig Laundy saying: "Our great concern in the Turnbull Coalition Government is what deals he might do with the ACTU. The loser out of all of this consistently, will be Australian businesses and Australian employees of those businesses."

The ACTU Congress takes place in Brisbane over two days from tomorrow.